1-Benzyl-6,8-dimethyl-4-phenyl-2-tosyl-1,2,3,3a,4,6,7,8,9,9b-deca-hydro-pyrrolo[3,4-c]pyrano[6,5-d]pyrimidine-7,9-dione.

The mol­ecule of the title compound, C31H31N3O5S, adopts a folded conformation, with the sulfonyl-bound phenyl ring lying over the pyrimidine ring [dihedral angle = 12.04 (6)° and centroid–centroid separation = 3.6986 (8) A]. The pyrrolidine ring adopts a twist conformation, the dihydro­pyran ring is in a half-chair conformation and the two rings are cis-fused. The tosyl group is attached to the pyrrolidine ring in an equatorial position while the benzyl group is axially attached. The mol­ecular structure is stabilized by weak C—H⋯O hydrogen bonds and C—H⋯π inter­actions. In the crystal, pairs of mol­ecules related by inversion symmetry are linked by C—H⋯O hydrogen bonds, forming chains propagating along the c axis which are cross-linked into a three-dimensional framework by further C—H⋯O links.